Important case regarding additional testing of item lawfully seized (but without a search warrant)
The case is State v. Sines. It is a significant, thorough opinion on a particularly complicated search and seizure issue.
This opinion is almost certainly helpful in cases where the police lawfully seize a firearm without a warrant (during a traffic stop, for example) and then do an arguably unlawful ballistics test, also without a search warrant. The facts in Sines are much, much different, but the analysis would be similar.